feat: production run — Q61 ramp, /404/, CloudFront router, cutover runbook

Five items of Pouya's production run, 2026-09-01.

Q61 — scroll-padding-top becomes a max() ramp on `10lh - 83px`, with the
plain calc() first as the fallback for engines without `lh`. Hidden focus
stops under minimumFontSize=32: 290 of 1,455 -> 0, control build still
290. Default settings byte-identical (0 differences over 352 page-widths x
17 fields). The 12 residual cells at minimumFontSize=16/20 are pre-existing
and unchanged-or-better; reported, not widened, per instruction.

Intake backend + CloudFront — docs/09-cutover-runbook.md is the
copy-paste sequence for admin execution: every command followed by its
verification and expected output, rollback per part, and Part 10 is Q60's
TTL test. infra/cloudfront/router.js is the trailing-slash function
(30-case suite; 8 fail against the pre-review version, incl. a
protocol-relative open redirect). infra/cloudfront/configure.mjs is
dry-run-by-default and idempotent. scripts/intake-env.mjs emits the six
Lambda env vars from src/data/site.ts.

Four launch blockers found by reading the running system:
  - handler.mjs wrote pk/sk; the live table's key is submissionId with no
    sort key, so every submission would have failed validation silently
  - the Lambda invoke permission is scoped to the old route path
  - 22 of 23 pages 403 without the router function
  - there was no 404 page; src/pages/404.astro adds it

Claims audit (D20 cutover pass) — five gloss over-reaches corrected on
/practice/energy/, /practice/insurance/ (x2), /practice/technology/ and
/med-arb/. Three findings left open for Pouya: Q62, the /med-arb/ gloss,
and Q60.

Q62 — one frozen-tripwire pattern added under the freeze's own breach
exception, with a probe and four negative fixtures. check:claims exits 1
until the false /legal/privacy/ sentence is corrected, so both deploy
paths are blocked by a mechanism rather than by memory.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Md3GndFqWPzK78xAoebsg5

scripts/og-proof.mjs

@@ -67,6 +67,18 @@ async function pages(dir = DIST) {
       const rel = relative(DIST, dir).split(sep).filter(Boolean).join('/');
       out.push({ path: rel ? `/${rel}/` : '/', file: full });
     }
+    /* ⚠️ `index.html` ALONE MISSED A WHOLE PAGE. `build.format: 'directory'`
+       puts every route at `<dir>/index.html` — except the ones Astro emits
+       outside the convention, and `404.astro` becomes `dist/404.html`. So this
+       script enumerated 22 pages of 23, and the symptom was backwards: it
+       reported the 404 page's card as ORPHANED ("generated, but no built page
+       references it") rather than reporting the page as unchecked. `path` here
+       is an `OG_CARDS` key, which is `Astro.url.pathname` — `/404/`, not
+       `/404.html`. `scripts/lighthouse.mjs` had the same blind spot and needs
+       the URL form instead; see the note there.                              */
+    else if (dir === DIST && entry.name.endsWith('.html')) {
+      out.push({ path: `/${entry.name.replace(/\.html$/, '')}/`, file: full });
+    }
   }
   return out.sort((a, b) => a.path.localeCompare(b.path));
 }